Assigitob of one-half his



H. B. STOUFFEB.

Pipe-Wrench.

Patente dJa'n.26,1875. Hal

FICWH no m WlTNES SE. S 4/41 z UNITED STATES PATENT OFFI E.

HIRAM O. STOUFFEB, GANFIELD, OHIO, ASSIGNOR OF ONE-HALF HIS RIGHT TOJOHN OHILDS, OF SMITHS FERRY, PENNSYLVANIA.

IMPROVEMENT IN PIPE-WRENCHES.

Specification forming part of Letters Patent No. 159.229, dated January26, 1875; application filed August 31, 1874.

To all whom it may concern:

Be it known that I, HIRAM (3. STOUFFER, (assignor of one-half interestto John Ohilds,) of Oanfield, in the county of Mahoning and State ofOhio, have invented certain new and useful Improvements in Pipe-Wrench;and I do hereby declare that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art towhich it appertains to make and use the same, referencebeing had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

My invention consists of a pipe-tongs in which the toothed jaw is madeadjustable by means of a circular plug-bearing secured to a forkedblock, provided with an adjusting device, and the plug guided in itsadjustment by means of projections formed upon it and by the forkedblock, whereby the movable jaw is connected With the adjusting device,and carried by said plug-bearing within the slot of the fixed jaw-bar;also, in the combination of the outside bearing-plug projections withthe fixed jaw-bar and the toothed jaw, the object whereof is to causethe griping of the latter to be supported by a clamping action upon theback of the fixed jaw by said projections, and relieve theadjusting-device connection of undue strain.

In the accompanying drawings, Figure 1 represents aside view. of awrench embracing my invention Fig. 2, a sectional view of the same; Fig.3, a view of the movable jaw with its plug-bearing detached; and Fig. 4,a cross-section of the jaws through the plugbearing.

The device consists of two griping-jaws, a and 1), formed upon the endsof jaw-bars, which terminate in handles 0 d, by which to manipulate thedevice. The jaw-bar a has longitudinal slot 6, within which the movablejaw b is fitted, to allow it to be adjusted in relation to the fixedjaw, according to the size of the pipe or nut to be clamped. The movablejaw is provided with an opening, g, to receive the plug-bearing, whichmust be of sufficient diameter to extend'beyond the slotted sides of thefixed jaw-bar, in order to form a connection by a screw, h, with anadjusting screwstem, '2', and thereby make the plug or ring bearing f afixed part of the adjusting device, so that the adjustment of the lattercarries the plug with it, and the jaw within which said plug is seated,and at the same time allows the movable jaw to turn freely upon theplugbearing. The inner end, j, of the screw-stem i is forked toembrace'the movable jaw 12, and that portion of the plug which extendsbeyond the inner side of the fixed jaw-bar, and it is at this point thatthe forked endj is connected to the plug by a solid screw, h, whichpasses through the forked end and the plug at or near its circumference.The movable jaw is guided by the forked endj of the screw-stem, whichlies upon the inner side of the jaw-bar a, and by lugs or projections 70k on the plug, which bear upon the back surface of the jawbar a, andform, with the adjusting device, the guides, which-hold the movable jawin place.

The outside plug-projections 7c 70 serve, in connection with'the jaw-bara, to support the movable jaw b by a clamping action of the projectionsupon the back of the slotted bar a, and the strain, instead of being inthe direction of the handles, is against the back of said bar.

It is not designed that the handles of the implement be opened widelyfor application to the pipe, as their adjustment in all cases isobtained by means of the adjusting-stem.

The screw-stem 1' passes through a projection, I, on the fixed jawbar a,and a milled nut, m, confined within a notchm, in said bar, and againstthe projection 1, serves to adjust the screw-stem i and the movable jaw,as may be desired.

I claim 1; The pipe-tongs having the toothed jaw 7), adjustable by meansof a plug-bearing, f, secured to the forked block j, the latter beingprovided with an adjusting device, and the In testimony that I claim theforegoing as my own I have affixed my signature in presence of twoWitnesses.

plug being guided in its adjustment by projections k is, formed upon it,and by the block j, substantially as shown and described.

2. The combination of the outside plugprojections k 70 with the jaw-bara and the HIRAM O. STOUFFER. movable jaw b, whereby the gripe of thelatter is supported by a clamping action of said Witnesses:

projections upon the back of the said jaw-bar A. E. H. JOHNSON, a,substantially as set torth. J. W. HAMILTON JOHNSON. l

